If Jeremiah were alive today he would preach publicly the wonder of God's organization praising Jehovah and admire how the NWT has made good use of his original prophetic book.
Typical JW speculation.
I believe that the focus of ch 25 is Judah as the text clearly indicates that its focus or target is Judah as proven by the opening verses to the chapter.
What you believe is irrelevant. The focus is explicitly stated to be other than what you say it is.
Josephus gives only one reference to the destruction of the temple alone as fifty years but in all the other refernce to both temple and Jerusalem he gives a period of seventy years from the Fall until the Return. Now it seems that you are adopting Josephian chronology alongside Neo Babylonian chronology but before you jump into the abyss you must realize that both sets of data differ widely and you should read the Dissertation V on the chronology of Josephus before you get too excited.
I don't need to 'adopt' anything, and I don't need to get "excited" about it. I don't need to twist and contort my interpretation to make it fit an agenda. Everything just falls into place. It is of course amusing that rather than having any logical counter-argument, you have to resort to such a lame response. That my bible-based data fits exactly with Josephus' information is a serious indictment to your flawed claim that Josephus agrees with you.
The complete desolation of the land is at the very heart of the seventy years which is what stumbles scholars because this concept is unbelievable. Jeremiah refers to the fulfillment of the seventy years and this indicates that all that Jeremiah's poetic description of the land must come to pass so it was with the Return in 537 the land was now inhabited. This is the reason why 539 is impossible because it does not meet the requirements of Jeremiah's prophecy. It is not the judgement on a king of Babylon that ends the seventy years but a devastated land becoming re-inhabited.
The "concept is unbelievable" because Jeremiah explicitly stated that the 70 years were of nations serving Babylon after which its king would be judged. Jeremiah makes no mention of the Jews returning in connection with the end of the 70 years. Jeremiah explicitly states that when the 70 years were fulfilled, Babylon's king would be called to account. There is simply no justification for what you are saying.
October 1914 certainly does accommodate World War 1 which began a few months earlier but a little further research in some earlier Watchtowers would help you on this matter but as you are not really interested you can remain in your obstinacy.
I have read the flawed attempts to try to salvage the October date (and have referred to them in previous posts, but you probably ignored what I said), and they are quite weak. "Obstinacy" is not a word.